Backpack



FIG. 1 is a perspective view of a backpack, showing my new design;

FIG. 2 is a perspective view showing the design in an alternate decorated configuration;

FIG. 3 is another perspective view of the backpack of FIG. 1 ;

FIG. 4 is a front view of the backpack of FIG. 1 ;

FIG. 5 is a rear view of the backpack of FIG. 1 ;

FIG. 6 is a left side view of the backpack of FIG. 1 ;

FIG. 7 is a right side view of the backpack of FIG. 1 ;

FIG. 8 is a top plan view of the backpack of FIG. 1 ; and,

FIG. 9 is a bottom plan view thereof.

The broken line showing of the backpack is for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a backpack, as shown and described. 